I have a NEW M3 tri colour stitch steering wheel with DCT paddles purchased from eurospeed a sponsor in America but have decided to go down a different route. item has never been used and is still in the box it came.

Excuse the ignorance, is the harness just for retrofitting paddles to a car that previously didn't have paddles? I'm looking at getting paddles for my pre-LCI M Sport (which came with the old school +/- paddles).